A 523.6 cm3 solid spherical steel ball was melted and remolded into a hollow steel ball so that the hollow diameter is equal to the diameter of the original steel ball. Find the thickness of the hollow steel ball.
An open cylindrical vessel 1.3 m in diameter and 2.1 m high is 2/3 full of water. If rotated about the vertical axis at a constant angular speed of 90 rpm,
1. Determine how high is the paraboloid formed of the water surface.
A. 1.26 m
C. 2.46 m
B. 1.91 m
D. 1.35 m
2. Determine the amount of water that will be spilled out.
A. 140 L
C. 341 L
B. 152 L
D. 146 L
3. What should have been the least height of the vessel so that no water is spilled out?